BIOS engineer the HCD was designed to have no line IRQ.
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On Thu, 2012-01-12 at 09:15 +0800, Alex,Shi wrote:
> On Wed, 2012-01-11 at 14:30 -0800, Sarah Sharp wrote:
> > On Wed, Jan 11, 2012 at 10:56:43AM +0100, Sebastian Andrzej Siewior wrote:
> > > not work for you. That would mean that your platform does not work in
> > > legacy mode. Is this some testing environment or real product? In case
> > > it is final, do you feed your bios engineer well?
> >
> > Sebastian has a point. Have we talked with the Intel BIOS engineers to
> > see if they can just fix this issue?
>
> Rui, Could you like help us do so?
> >
Sure.
We have checked this with the BIOS people.
He said that xHCI host controller needs neither a _PRT entry in ACPI,
nor legacy IRQ in PCI configuration space.
Because windows works well on this platform for them.
So I guess IRQ is not mandatory for windows and Linux can follow windows
to make legacy IRQ optional.
thanks,
rui
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